Coffee maker



Nov. 4, 1952 R. R. PERKINS 2,616,654

" COFFEE MAKER Filed March 13, 1950 Z2 zg %/7 /6 1000 o 000 /4- .0000 00-0 00 o o o oo :ooo 0 0 00 1 I 2090-009 :ooooooo i 0-000 000 3 l 3 M 000 o o oo oooo'o @0000 Z 00 o o o 0 I N VENTOR R./?.Per% 2' 5 ATTORNEYS Patented Nov. 4, 1952 UNITED STATES PATENT OFFICE COFFEE MAKER Ronald R. Perkins, Dallas, Tex.

Application March 13, 1950, Serial No. 149,279

1 Claim. 1

This invention relates to a cofiee maker.

An object of this invention is to provide a coffee maker of the pressurized type wherein the coifee is made under pressure.

Another object of this invention is to provide in a pressurized coffee maker an improved receptacle for the grounds.

A further object of this invention is to provide a receptacle having a spout with a pressure release valve carried by the spout so that pressure can be gradually released.

With the above and other objects in view, my invention consists in the arrangement, combination and details of construction disclosed in the drawings and specification, and then more particularly pointed out in the appended claim.

In the drawings:

Figure l is a vertical sectional view taken along the center line of one form of the device embodying this invention.

Figure 2 is a fragmentary sectionalview taken through the delivery spout, showing the pressure relief valve.

Referring to the drawings, the numeral designates generally a receptacle which is formed with a cylindrical side wall i I, a bottom wall l2, and a tapered frustro-conical upper portion l3. A handle [4 is secured to and extends from the side wall ll of the housing ID. A dome shaped cover is removably mounted on the upper end of the receptacle l0 and includes a depending annular flange i6 which engages within an inwardly offset annular flange l'l carried by the upper portion l3 of the receptacle Ill. The flange [6 has secured thereto a. plurality of circumferentially spaced apart locking pins 18 which are engageable in suitable bayonet slots formed in the flange l1.

A spring pressed safety valve 20 of conventional construction is secured to the closure l5, and a pressure indicator 2i is also secured to the closure l5. The frustro-conical portion l3 has extending angularly and upwardly therefrom a cylindrical spout 22 formed with interior threads within which a cap 23 is threadably mounted. The cap 23 includes a cylindrical member 24 and an inner wall 25 formed with pressure release openings 26. A pressure release valve 21 is carried by a stem 28 which is threaded through a gland 29, and the gland 29 is formed with openings 30. The outer side of the wall 25 forms a valve seat for the valve member 21 when this latter member is threaded inwardly to a closed position.

A perforated cylindrical coffee ground holder 3| formed with a bottom wall 32 is disposed centrally within the housing [0 and is seated at its lower end in a cup-shaped member 33 which is fixed to the bottom wall 12. An inverted cupshaped member 34 is fixed to the inner side of 2 the cover l5 and engages over the upper open end of the holder 3!. The two cup-shaped members 33 and 34 provide a means for holding the holder 3| centrally of the housing or receptacle 10.

In the use and operation of this device the coffee grounds are placed in the holder 31, and the cover i5 is then tightly secured to the upper end of the receptacle l0. Valve member 21 at this time will be moved inwardly to a position closing the ports or openings 26.

The water in the receptacle I0 is heated for a predetermined period of time, thereby producing a predetermined pressure in the receptacle, and if the pressure should become excessive the pressure is partially reduced by the safety valve 26. After the cofiee has been produced the pressure in the receptacle l0 may be relieved by moving release valve member 21 outwardly so that the pressure may exhaust through ports 26 and 36. When th pressure has been exhausted in receptacle ID the cap 23 may be removed and the liquid poured through the spout 22.

What is claimed is:

A valve assembly for use with a pressurized coiiee maker including a receptacl having an internally threaded spout and a cap therefor, said cap comprising a plate, an outer externally threaded flange engageable in said spout and an inner internally threaded flange dependingly surrounding a central aperture in said plate, an inner Wall having openings therethrough at the base of said inner flange; an externally threaded gland engageable with the threads of said inner flange, said gland having a central internally threaded bore therein and off-center vent parts, a valve guide threaded into said bore, and a valve of less diameter than the inner flange on said valve guide for opening and closing said openings in said inner wall.

RONALD R. PERKINS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 173,713 Brewster Feb. 22, 1876 1,070,453 Griffin Aug. 19, 1913 1,596,415 Enright Aug. 17, 1926 FOREIGN PATENTS Number Country Date 65,998 Sweden of 1927 214,052 Great Britain of 1924 237,151 Great Britain of 1925 610,938 Great Britain of 1948 653,219 France of 1929 

